/*
 * Copyright (c) 2010, Jim Hollinger
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of Jim Hollinger nor the names of its contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef COMMON_LOGGER_LOGGER_H_
#define COMMON_LOGGER_LOGGER_H_

#include <iostream>
#include <streambuf>
#include <string>

namespace logger {

class Logger {
  friend class LoggerFactory;

  public:
    static bool initialize(const std::string &name);
    static Logger *getInstance();
    static void cleanup();
    static void unitTest();
    void setLogLevel(int /* log4cplus::LogLevel */ logLevel);

    void trace(const char *format, ...);
    void debug(const char *format, ...);
    void info (const char *format, ...);
    void warn (const char *format, ...);
    void error(const char *format, ...);
    void fatal(const char *format, ...);

  protected:
    Logger();
    ~Logger();

  protected:
    void                   *myLogger;       // log4cplus::Logger
};


// http://spec.winprog.org/streams/
class LogStream : public std::streambuf  {
  public:
    typedef std::char_traits<char> _Tr;

    LogStream();
    virtual ~LogStream();
    void setLogger(Logger *dst, int /* log4cplus::LogLevel */ logLevel);

  protected:
    virtual int_type overflow(int_type c = _Tr::eof());

  protected:
    char_type  *buf;
    int         buf_index;
    Logger     *logger;
    int         logLevel;
};


class LoggerStream : public std::ostream {
  public:
    LoggerStream(Logger *logger, int /* log4cplus::LogLevel */ logLevel);

  protected:
    LogStream   buf;
};


class LoggerClog : public LoggerStream {
  public:
    explicit LoggerClog(Logger *logger);
};


class LoggerCout : public LoggerStream {
  public:
    explicit LoggerCout(Logger *logger);
};


class LoggerCerr : public LoggerStream {
  public:
    explicit LoggerCerr(Logger *logger);
};

}  // namespace logger

#endif  // COMMON_LOGGER_LOGGER_H_
